File:Stage11 bf9.jpg: Difference between revisions

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Human Embryo Head (Carnegie stage 11)

Carnegie stage 11, Week 4 (25 days, 20 somite pairs), ventral view.
GA week 6.
Ventral view - brain fold, stomodeum, buccopharyngeal membrane, pharyngeal arches, primitive heart.

Stage 11 Links: SEM image | SEM Detail - buccopharyngeal membrane

Ventral view of the Week 4 embryo head, showing the stomodeum (stomatodeum or stomatodaeum) region with the floor of this region occupied by the degenerating buccopharyngeal membrane. Loss of buccopharyngeal membrane opens the gastrointestinal and respiratory tract to amniotic fluid for the remainder of development.

A SEM image version of this image is also available.

Relative to the Stomodeum

Cranial (above) lies brain bulge covered in thin layer of surface ectoderm (surface crack is processing artefact).
Lateral (beside) lie the primordia of the first pharyngeal arch.
Inferior (below) lies the developing heart (lower left of image), ventral body wall removed to show heart tube.

Image Source: Scanning electron micrographs of the Carnegie stages of the early human embryos are reproduced with the permission of Prof Kathy Sulik, from embryos collected by Dr. Vekemans and Tania Attié-Bitach. Images are for educational purposes only and cannot be reproduced electronically or in writing without permission.

Embryonic Development

Carnegie Stages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | About Stages | Timeline

Image version links: Large 1700px | 1000px | Medium 800px

Cite this page: Hill, M.A. (2024, April 16) Embryology Stage11 bf9.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Stage11_bf9.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	10:54, 15 May 2011		1,797 × 2,247 (289 KB)	S8600021 (talk \| contribs)	==Human Embryo Carnegie stage 11== This is a ventral view of embryo (25 days, 20 somite pairs) head showing open cranial (anterior) neuropore and heart tube. Carnegie stage 11: Week 4, 23 - 26 days, 2.5 - 4.5 mm, Somite Number 13 - 20 View: ventral vie

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@@ Line 8: / Line 8: @@
 :[[Carnegie stage 11|'''Stage 11 Links''']]: [[:File:Stage11_bf4.jpg|SEM image]] | [[:File:Stage11_sem2.jpg|SEM Detail - buccopharyngeal membrane]]
-| valign=top| width=400px|Ventral view of the Week 4 embryo head, showing the stomodeum (stomatodeum or stomatodaeum) region with the floor of this region occupied by the [[:File:Stage11_sem2.jpg|degenerating buccopharyngeal membrane]]. Loss of buccopharyngeal membrane opens the gastrointestinal and respiratory tract to amniotic fluid for the remainder of development.
+| valign=top width=400px|Ventral view of the Week 4 embryo head, showing the stomodeum (stomatodeum or stomatodaeum) region with the floor of this region occupied by the [[:File:Stage11_sem2.jpg|degenerating buccopharyngeal membrane]]. Loss of buccopharyngeal membrane opens the gastrointestinal and respiratory tract to amniotic fluid for the remainder of development.
 A [[:File:Stage11_bf4.jpg|SEM image version]] of this image is also available.